The Death Star's size varies slightly depending on the source, but generally:

• The first Death Star is about 120 to 160 kilometers (75 to 99 miles) in diameter.
• The second Death Star is larger, roughly 160 to 200 kilometers (99 to 124 miles) in diameter.

These dimensions make the Death Stars moon-sized space stations, with the first being somewhat smaller and the second notably bigger. The second Death Star is often cited as about 200 km in diameter, making it the largest version shown in the Star Wars films.